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Finding the Fourth Proportional to 880.96, 1,321.88 and 361.34

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Solution

The fourth proportional to 880.96, 1,321.88 and 361.34 is: 542.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.96 : 1,321.88 = 361.34 : x
  2. Step 2: Convert to fraction form
    880.96/1,321.88 = 361.34/x
  3. Step 3: Cross multiply
    880.96x = 1,321.88 × 361.34
  4. Step 4: Simplify right side
    880.96x = 477,649.62
  5. Step 5: Solve for x
    x = 477,649.62/880.96
  6. Step 6: Final answer
    x = 542.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.